خانه » ویژه » نگاهی به وضوح بالا ...

نگاهی به وضوح بالا ...


به من اطلاع بده

High-Resolution (or “Hi-Res”) will probably be on the lips of everyone who has anything to do with the studio industry in perpetuity. No matter what the resolution is at any given time, there will always be a higher resolution being strived for. While 4K has already become a reality for professional who record in it and perform post-production with it as well, it is because a 4K فوق العاده HD تلویزیون (یا UHDTV) با هشت میلیون پیکسل چهار برابر رزولوشن تصویر 1080p Full را ارائه می دهد HD، که فقط دو میلیون پیکسل است؛ به عبارت دیگر، تعداد بیشتری پیکسل برای بازی کردن.

Most in the industry believe that if their content is recorded in the highest resolution available, it will “future-proof” their content, ensuring its value for years to come. However, the industry changes so fast that even that hope is already outdated.

For example, following that logic, someone not too long ago would have reasoned that placing their super 8 home movies on a VHS tape would future-proof that content. Logic: FAIL.

But the industry is not standing around waiting for the hi-res format to suddenly be available to consumers without fully understanding and preparing for it themselves long beforehand. There are many key players in the broadcast/post-production side of the industry, but one of the foremost is آوید.

من مجبور نیستم بروم که "آوید” is, because if you’re in the industry, you already know who they are. If you’re not in the industry, go to www.avid.com and you’ll see. But to move this article along, I’ll assume you already know آوید.

2014 نمایش ناب دید آوید جدیدترین سرویس خود را معرفی کنید -آوید Everywhere.” I covered the announcement quite extensively while at the Show, and wrote about it – here is a link to that article: Avid در همه جا

مطابق با آوید, the first real advance in the UHDTV technology is going to occur soon (this year or next, 2015). They have predicted frame rates capped at 60fps (progressive only), up to “4K” resolution (3840×2160), 10/12 bit color – (no more 8 bit), Bt.2020 or 709 color space, HEVC compression, and audio 5.1 and 7.1; Between 2015 and 2020, it is believed that frame rates will be increased to 120Hz, with advances in video and audio; finally, in 2020, for the Tokyo Olympics, a prediction of 7280×4320 “8K” resolution (Japan’s Super High Vision – In August, 2012, the International Telecommunication Union (ITU) approved a set of high-resolution standards developed by NHK Labs as their ITU-R Recommendation BT.2020 UHDTV specification for Ultra High-Definition Television). This 8K will deliver 16 times the HD رزولوشن، در حال ظهور میلیون دلاری 33 است.

و در حالی که "K" های مختلف باقی مانده اند، با قطعنامه های بالاتر تنها برای آن خانه های تولید و پس از تولید (و نه به مصرف کنندگان جو Blow که خارش برای چنین کیفیت بالا هستند)، حداقل در برخی از نقاط جهان ایده گرفتن 4K به مصرف کننده نه تنها زنده است، بلکه موجب طوفان می شود!

According to their Press Release, Homechoice was responsible for an industry first on April 10, 2014. On that date, Homechoice launched UMAX, the first UHD cable channel in the world, broadcast in 4Kp60 (3840×2160 pixel resolution with 60 frames per second).

TITAN is chosen for exceptional video quality and compatibility – TITAN is ATEME¹s next generation TV Head-End, a real-time multi-channel/format encoder/transcoder for multi-screen delivery of linear channels and video-on-demand. Homechoice selected TITAN for its best-in-class picture quality (using 32mbps for 4Kp60) and for its proven compatibility with embedded decoders in today¹s most popular TV brands.

هیچ جعبه تنظیم مورد نیاز - با استفاده از قابلیت های رمز گشایی HEVC ساخته شده به تلویزیون های سازگار UHDTV - و دانلود نرم افزار برای رمزگشایی UMAX در تلویزیون خود - مشترکین کابلی تلویزیون در سراسر کره جنوبی دسترسی به آخرین محتوای UHD

محتوا اصلی - راه اندازی اولیه UMAX شامل برنامه های اصلی 40، ترکیبی از فیلم ها، مستند و انیمیشن، که از 6 به 2 من KST اجرا می شود. Homechoice قصد دارد تا پایان 100 خود را برای برنامه های 2014 افزایش دهد.

بدون هزینه برای مشترکین - UMAX تامین مالی و توزیع شده توسط تمام MSO کره جنوبی (CJ Hellovision، C & M، T-Broad و HCN) و بدون هزینه اضافی برای مشترکین در 2014 در دسترس است.

"با ادغام قابلیت های HEVC به تلویزیون های UHDTV و یک کانال کابلی که مصرف کنندگان را قادر به لذت بردن از این تکنولوژی پیشرفته امروز، برنامه نویسان کابلی در سراسر جهان با توجه به علاقه مندان به پخش UMAX تماشا می کنند. ما افتخار می کنیم بخشی از راه اندازی اولین کانال کابل 4K در سراسر جهان باشد، گفت: Eunsook Wi، مدیر منطقه APAC، ATEME.

Obviously, this has just happened, so the affects cannot yet be measured. Broadcast Beat will keep you posted as information and data becomes available.

جالب است که توجه داشته باشید که استاندارد سینمای 4K از رزولوشن بومی 4096 × 2160 است و فرمت UMAX 3840 × 2160 است که دو اندازه گیری افقی و عمودی 1920 x 1080 یا 1080p Full HD"بنابراین، این درست نیست" 4K؛ اما به اندازه کافی نزدیک است که مهم نیست.

در همین حال، در مزرعه، در 2014 نمایش NAB, it was ALL about the pixels. While the different “K’s” were mentioned (2K, 4K, 8K, etc.), the real emphasis was on pixels – and the quality of the pixel itself, rather than how many you could fit on the screen. In addition to how great hi-res is for post and “future-proofing” content, it’s not much good unless you can see the difference.

Most people can’t really tell the difference between 2K and 4K – these are the limitations of the human eye. But I spoke to somebody at the Show – who requested to remain nameless (for fear of industry reprisal) – who commented that a 2K screen with “enhanced” pixels sitting next to a 4K screen gave a much crisper and sharper image – AND IT WAS TRUE! Well, the illusion was true, anyways. It was like sleight of hand… pick a pixel, any pixel…

ظاهرا، یک ترفند نسبتا جدید (برای داشتن یک اصطلاح بهتر) برای LCD ها وجود دارد که باعث بهبود وضوح ظاهری با کنترل زیر پیکسل های فردی و نه پیکسل ها می شود، در فرایندی به نام Subpixel Based Downsampling - به عبارت دیگر ، افزایش وضوح از طریق افزایش لومینسانس (نگاه کنید به مقاله اینجا اینجا است).

Subpixels, you say? Never heard of them! In black and white, you only need the pixel, which shows black and white. However, for color, you need subpixels of red, green and blue. Ah, RGB… sound familiar? Yes, it’s all down to that.

Before I launch into my “pixel tirade,” let me say a few things about the three main types of monitors – plasma, LCD and OLED. Plasma is almost history – despite its ability to produce the richest and darkest blacks, to get whites and the brightness necessary to make plasma worthwhile, it takes too much power. OLED’s use the least amount of power and are the brightest without having to be backlit, but the circuits wear out – the blue element of the RGB trio, first. Also, OLED screens are expensive, because there’s a low manufacturing rate of success. But that’s a different article. LCD is still the best, of the three, even though it requires a back light and, until recently, could not be bent or created in any configuration other than flat (curved LCD screens now available in the UK).

Back to the pixel. In black & white (or “monochrome”) systems, the pixel is the smallest unit that can be addressed. On color displays, each pixel contains red, green and blue “subpixels,” making it the smallest unit that can be addressed. It is the software that addresses the pixel and subpixels that make up the pixel. It is interesting to note that, in storage, pixels are made up of one or more bits, with “bit depth” representing the number of shades (mono or color). Of course, the most economical for storage purposes is monochrome, which uses just one bit per pixel (on/off). Gray scale and color typically use from 4 to 24 bits per pixel, providing from 16 to 16 million colors (256 shades of red x 256 shades of green x 256 shades of blue).

از طریق کنترل دقیق و تغییر ولتاژ اعمال شده، شدت هر زیر پیکسل می تواند بیش از حد باشد 256 shades. هنگام ترکیب، زیرپیکسلها یک پالت ممکن را تولید می کنند 16.8 میلیون رنگ، که take an extremely high number of transistors. To put it into perspective, a typical laptop computer supports resolutions up to 1,024×768. If the 1,024 columns were multiplied by the 768 rows, then multiplied by each of the 3 subpixels, we get 2,359,296 transistors etched onto the glass! When there is a problem with any of these transistors, a “bad pixel” is created on the display. Considering that fact, it’s not too unbelievable that many active matrix displays have several bad pixels in various places across the screen.

So, when you get right down to it, it’s the pixel that controls hi-res. Whether it’s in the quantity or the quality (or process), it all comes down to the picture cell. From “how many your camera sensors can record” to “how many your monitors can display,” and via whichever process, the world of high-resolution revolves around the pixel.


به من اطلاع بده

پخش ضرب و شتم مجله

Broadcast Beat Magazine یک شریک رسمی نمایشگاه NAB Show Media است و ما در زمینه پخش، مهندسی و فناوری رادیو و تلویزیون برای صنایع انیمیشن، پخش، تصویربرداری و پست تولید می کنیم. ما رویدادهای صنعتی و کنوانسیون هایی مانند BroadcastAsia، CCW، IBC، SIGGRAPH، Symposium Digital Asset و موارد دیگر را پوشش می دهیم!

آخرین ارسال های انجمن Broadcast Beat Magazine (دیدن همه)

پاسخ دهید

G|translate Your license is inactive or expired, please subscribe again!